28613611 has 8 divisors (see below), whose sum is σ = 30935520. Its totient is φ = 26308992.

The previous prime is 28613597. The next prime is 28613621. The reversal of 28613611 is 11631682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28613611 - 2⁵ = 28613579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28613611.

It is not an unprimeable number, because it can be changed into a prime (28613621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 766 + ... + 7603.

It is an arithmetic number, because the mean of its divisors is an integer number (3866940).

Almost surely, 2^28613611 is an apocalyptic number.

28613611 is a deficient number, since it is larger than the sum of its proper divisors (2321909).

28613611 is a wasteful number, since it uses less digits than its factorization.

28613611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8645.

The product of its digits is 1728, while the sum is 28.

The square root of 28613611 is about 5349.1691878272. The cubic root of 28613611 is about 305.8610836550.

Multiplying 28613611 by its sum of digits (28), we get a palindrome (801181108).

The spelling of 28613611 in words is "twenty-eight million, six hundred thirteen thousand, six hundred eleven".